Turnstile.



No; 640,998. Patented Ian. 9, I900.

A. P. DODGE. TURNSTIL E.

(Application filed Apr. 14, 1899.)

(No Model.) 2 Sheets-*Sheei 2.

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srnoirroa'rron forming part of Letters Patent No. 640,998, dated Januarye, 1906.

Application filed Apri114,1899.

To aZZ whom it may concern.-

Be it known that I, ARTHUR PILLSBURY DODGE, a citizen of the UnitedStates, residin g at New York city, State of New Yorlnhave inventedcertain new and useful Improvements in Turnstiles, of which thefollowing is a specification.

This invention relates to an improvement in turnstile-entrances forbuildings.

The object of the invention is to carry the person as soon as he stepsinto the turnstile automatically through the same, and as soon as he islanded within the building the turnstile is stopped automatically.

In the annexed drawings, forming part of this specification, Figure 1represents'a sectional vertical elevation of an entrance and turnstileof a building constructed in accordance with my invention. Fig. 2 is ahorizontal section of the same. Fig. 3 is an enlarged view of the lowerpart of the platform and its driving mechanism, said parts being insection.

The letter A indicates the entrance of the building, and B is thevertical turnstile, which consists of several radial equidistantvertical partitions or wings O, a central pivot or trunnion D, guidedina bearing in the coiling of the entrance A, and a trunnion or pivot D,guided in a step-bearing E in a central cavity in the floor of theentrance way or passage.

On the bottom ends of the partitions C is constructed and attached ahorizontal circular step floor or platform G of the same radius as thepartitions or wings C. The top ends of said partitions are also combinedand are covered by a horizontal circular top board G. The entrance-floorhas a circular cavity H under the turnstile to permit the platform G topass freely into the entrance-floor.

Under the platform G is arranged a horizontal bevel gear-wheel K, with ahub guided in the step-bearing E, and the hub of the wheel K has avertical opening in whichis employed a strong spiral spring F,surrounding the trunnion D, guided in the step-bearing E. The spiralspring F rests on the bottom of the bearing E, and its top end pressesagainst the bottom side of the platform G, and is of a strengthsufficient to balance the weight of the turnstile. The upper side ofSerial No. 713,040. (N0 model.)

the bevel-gear K has a circular rim N', and on the bottom side of theplatform G is secured a ring 0 to engage with its bottom face the upperopposite face of the rim N by being pressed down upon it. The bevel gearwheel K is toothed on the bottom side of its rim and engagesabevelpinion-gear P,mounted upon a horizontal counter-shaft Q, arrangedunder the bevel gear-wheel K, and the shaft Q is driven through powerderived from the elevator or other power in the build= ing. The circularrim N may engage the rim 0 by one of them having teeth or projectionsand the other cavities, or both may be made to engage by friction. Assoon as the person steps upon the platform G the spring F yields to theweight and pressure of the person, thus engaging therim O with themoving rim N and causing the automatic motion of the turnstile, carryingthe person through the entrance. As soon as the person steps off theplatform G the rims O and N disengage by the action of the spring F,and'thereby the turnstile is stopped. The rim N is shown more clearly inFig. 3. In the ring 0 I may place a piece of rubber or other material,as at O, to get a better frictional contact with the rim N.

WVhat I claim, and desire to secure by Letters Patent, is-- 1. Incombination, a turnstile comprising a platform, driving means forrotating the platform and transmitting means between the platform anddriving means arranged to be put into and out of operative engagement bythe weight of the person stepping on the platform, substantially asdescribed.

2. In combination in a turnstile, a depressible platform, means forholding it normally up, and driving means below the platform arranged tobe thrown into operative engagement therewith when the platform isdepressed, substantially as described.

3. In combination in a turnstile, the wings, a platform or step-board atthe lower end of the same connected thereto, a spring under the platformto hold the turnstile normally up, and a rotating drive-wheelbelow theplatform arranged to be thrown into operative engagement with theplatform when the same is. depressed, substantially as described.

4. In combination, a turnstile having vertical displacement under theWeight of a perfor rotating the same when under the Weight son and meansfor turning the turnstile, said of the person.

means being caused to act on the tnrnstile upon the depression of thesame, substantially as described.

5. In combination, a turnstile having vertical displacement under theWeight of aperson, means for lifting the turnsti1e,and means Intestimony whereof I affix my signature in presence of two Witnesses.

ARTHUR PILLSBURY DODGE. Witnesses:

REINHOLD BOEKLIN, CHARLES L. EASTON.

